Cup lid



FIG. 1 is a Top perspective view of the cup lid.

FIG. 2 is a Top plan view of the cup lid.

FIG. 3 is a side view of the cup lid; and,

FIG. 4 is a bottom plan view of the cup lid.

The portions of the cup lid shown in broken lines disclose environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a cup lid, as shown and described. 